The document is a presentation on e-payment systems. It discusses the definition of e-payment, objectives of e-payment such as understanding concepts and security services. Examples provided include online reservations, bill payments, and ticketing. Methods discussed include online and offline, with online relying on trusted third parties like banks. Types of e-payment explained are e-cash, e-wallets, smart cards, and credit/debit cards. Security requirements and how payment gateways work are also summarized. The conclusion is that e-payment expands markets and makes payments more convenient.